Service manual

19" LCD Color Monitor AOC 917Sw
32
8.2 Trouble Shooting
8.2.1 Main Board
No power
No power
Press power key and look if the
picture is normal
Please reinsert and make sure the
AC of 100V-240V is normal
Reinsert or check the
power section
Check if X401 oscillate
waveforms are normal
Check C423(+)=1.8V
U
404
V
o
ut
=
3.3V
OK
OK
NG
NG
NG
Replace CN404, Q410, Q409, U404
Replace U401
Replace X401
NG
OK